数据搜索系统，热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

预览 PDF HTML

MAX20002CATPC 数据表(PDF) 16 Page - Maxim Integrated Products

部件名 MAX20002CATPC
功能描述  36V, 220kHz to 2.2MHz, 2A/3A Fully Integrated Step-Down Converters with 15關A Operating Current
PDF  19 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  MAXIM [Maxim Integrated Products]
网页  https://www.maximintegrated.com/en.html
标志 MAXIM - Maxim Integrated Products

MAX20002CATPC 数据表(HTML) 16 Page - Maxim Integrated Products

Back Button MAX20002CATPC Datasheet HTML 11Page - Maxim Integrated Products MAX20002CATPC Datasheet HTML 12Page - Maxim Integrated Products MAX20002CATPC Datasheet HTML 13Page - Maxim Integrated Products MAX20002CATPC Datasheet HTML 14Page - Maxim Integrated Products MAX20002CATPC Datasheet HTML 15Page - Maxim Integrated Products MAX20002CATPC Datasheet HTML 16Page - Maxim Integrated Products MAX20002CATPC Datasheet HTML 17Page - Maxim Integrated Products MAX20002CATPC Datasheet HTML 18Page - Maxim Integrated Products MAX20002CATPC Datasheet HTML 19Page - Maxim Integrated Products  
Zoom Inzoom in Zoom Outzoom out
 16 / 19 page
background image
A dominant pole (fdpEA) is set by the compensation capac-
itor (CC) and the amplifier output resistance (ROUT_EA). A
zero (fZEA) is set by the compensation resistor (RC) and
the compensation capacitor (CC). There is an optional
pole (fPEA) set by CF and RC to cancel the output capaci-
tor ESR zero if it occurs near the crossover frequency (fC,
where the loop gain equals 1 (0dB)). Thus:
zEA
CC
1
f
2C
R
=
π×
×
pdEA
C
OUT,EA
C
1
f
2
C
(R
R )
=
π×
×
+
pEA
F
C
1
f
2C
R
=
π×
×
The loop-gain crossover frequency (fC) should be set
below 1/5 of the switching frequency and much higher
than the power-modulator pole (fpMOD)
SW
pMOD
C
f
ff
5
<<
≤
The total loop gain as the product of the modulator gain,
the feedback voltage divider gain, and the error amplifier
gain at fC should be equal to 1. So:
FB
MOD(fC)
EA(fC)
OUT
V
GAIN
GAIN
1
V
××
=
For the case where fzMOD is greater than fC:
EA(fC)
m,EA
C
GAIN
g
R
=
×
Therefore:
FB
MOD(fC)
m,EA
C
OUT
V
GAIN
g
R
1
V
×
×
×=
Solving for RC:
OUT
C
m,EA
FB
MOD(fC)
V
R
g
V
GAIN
=
××
Set the error-amplifier compensation zero formed by RC
and CC (fzEA) at the fpMOD. Calculate the value of CC a
follows:
C
pMOD
C
1
C
2f
R
=
π×
×
If fzMOD is less than 5 x fC, add a second capacitor (CF)
from COMP to GND and set the compensation pole
formed by RC and CF (fpEA) at the fzMOD. Calculate the
value of CF as follows:
F
zMOD
C
1
C
2f
R
=
π×
×
As the load current decreases, the modulator pole
also decreases; however, the modulator gain increases
accordingly and the crossover frequency remains the
same. For the case where fzMOD is less than fC:
The power-modulator gain at fC is:
pMOD
MOD(fC)
MOD(dc)
zMOD
f
GAIN
GAIN
f
=
×
The error-amplifier gain at fC is:
zMOD
EA(fC)
m,EA
C
C
f
GAIN
g
R
f
=
××
Therefore:
zMOD
FB
MOD(fC)
m,EA
C
OUT
C
f
V
GAIN
g
R
1
V
f
×
×
××
=
Solving for RC:
OUT
C
C
m,EA
FB
MOD(fC)
zMOD
Vf
R
g
V
GAIN
f
×
=
××
×
Set the error-amplifier compensation zero formed by RC
and CC at the fpMOD (fzEA = fpMOD).
C
pMOD
C
1
C
2f
R
=
π×
×
If fzMOD is less than 5 × fC, add a second capacitor CF
from COMP to ground. Set fpEA = fzMOD and calculate
CF as follows:
F
zMOD
C
1
C
2f
R
=
π×
×
www.maximintegrated.com
Maxim Integrated │ 16
MAX20002/MAX20003
36V, 220kHz to 2.2MHz, 2A/3A Fully
Integrated Step-Down Converters
with 15μA Operating Current



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19


数据表 下载

Go To PDF Page


链接网址



ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   数据表链接    |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com